Korean Demilitarized Zone

The Korean Demilitarized Zone (DMZ) is the buffer zone between North and South Korea, running across the peninsula roughly following the 38th parallel. It was created by agreement between North Korea, China and the United Nations in 1953. The DMZ is 250 kilometres (160 miles) long, and about 4 kilometres (2.5 miles) wide.

Within the DMZ is a meeting-point between the two nations in the small Joint Security Area (JSA) near the western end of the zone, where negotiations take place. There have been various incidents in and around the DMZ, with military and civilian casualties on both sides. Several tunnels are claimed to have been built as an invasion route for the North Koreans.

Location

The Korean Demilitarized Zone (DMZ; Hangul: 한반도 비무장지대; hanja: 韓半島非武裝地帶) is a strip of land running across the Korean Peninsula. It was established at the end of the Korean War to serve as a buffer zone between North and South Korea. The DMZ is a de facto border barrier that divides the Korean Peninsula roughly in half. The DMZ roughly follows the 38th parallel north on an angle, with the west end of the DMZ lying south of the parallel and the east end lying north of it. It was created as part of the Korean Armistice Agreement between North Korea, the People's Republic of China, and the United Nations Command forces in 1953. The DMZ is 250 kilometres (160 miles) long, approximately 4 km (2.5 mi) wide and, despite its name, is the most heavily militarized border in the world. The Northern Limit Line, or NLL, is the disputed maritime demarcation line between North and South Korea in the Yellow Sea, not agreed in the armistice. The coastline and islands on both sides of the NLL are also heavily militarized.

Demilitarized zone

A demilitarized zone, DMZ or DZ is an area in which treaties or agreements between nations, military powers or contending groups forbid military installations, activities or personnel. A DMZ often lies along an established frontier or boundary between two or more military powers or alliances. A DMZ may sometimes form a de facto international border—for example, the 38th parallel between North and South Korea. Other examples of demilitarized zones are a 120-mile (190 km) area between Iraq and Kuwait, Antarctica (preserved for scientific exploration and study) and outer space (space more than 100 miles (160 km) from the earth's surface).

Many demilitarized zones are considered neutral territory because neither side is allowed to control it, even for non-combat administration. Some zones remain demilitarized after an agreement has awarded control to a state which (under the DMZ terms) had originally ceded its right to maintain military forces in the disputed territory. It is also possible for powers to agree on the demilitarization of a zone without formally settling their respective territorial claims, enabling the dispute to be resolved by peaceful means such as diplomatic dialogue or an international court.

DMZ (computing)

In computer security, a DMZ or demilitarized zone (sometimes referred to as a perimeter network) is a physical or logical subnetwork that contains and exposes an organization's external-facing services to a larger and untrusted network, usually the Internet. The purpose of a DMZ is to add an additional layer of security to an organization's local area network (LAN); an external network node only has direct access to equipment in the DMZ, rather than any other part of the network. The name is derived from the term "demilitarized zone", an area between nation states in which military operation is not permitted.

Rationale

In the military sense, a DMZ is not seen as belonging to either party bordering it. This concept applies to the computing use of the metaphor in that a DMZ which is, for example, acting as a gateway to the public Internet, is neither as secure as the internal network, nor as insecure as the public internet.

In this case, the hosts most vulnerable to attack are those that provide services to users outside of the local area network, such as e-mail, Web and Domain Name System (DNS) servers. Because of the increased potential of these hosts suffering an attack, they are placed into this specific subnetwork in order to protect the rest of the network if an intruder were to compromise any of them successfully.

Vietnamese Demilitarized Zone

The Vietnamese Demilitarized Zone was established as a dividing line between North and South Vietnam as a result of the First Indochina War.

During the Second Indochina War (popularly known as the Vietnam War), it became important as the battleground demarcation separating North Vietnamese territory from South Vietnamese territory.

Geography

The Vietnamese Demilitarized Zone ran from east-west near the center of present-day Vietnam (spanning more than a hundred kilometers) and was a couple of kilometers wide. It ran along the Ben Hai River for much of its length, and an island nearby was controlled by North Vietnamese forces during the Vietnam War. Although it was nominally described as being at "the 17th parallel," almost all of the zone lies to the south of the parallel, with only a small portion of the zone near the eastern end actually including the parallel.

It was around a hundred kilometers north of the city of Huế.

The First Indochina War

The First Indochina War (also called the French Indochina War) was fought in French Indochina from 1946 through 1954 between France and the French-controlled State of Vietnam on the one side, and the Communist-dominated independence movement, the Viet Minh, on the other. The Viet Minh won the war, gaining effective control of all northern Vietnam except an enclave around Hanoi.